Welcome to History Hub
for a free website go to the following page and register for a free account on familysearch.org.
After registering go to the following page and enter Marcelino Rios
You will find a lot of information about your family on this site.
If you need further assistance please do not hesitate to ask.
Dear Ms. Opoien,
Thank you for posting your request on History Hub!
We suggest that you search for records of your grandfather’s marriage in the Historical Records Collection “United States Marriages” and the FamilySearch indexes for Puerto Rico, Civil Registration, 1805-2001 and Puerto Rico, Catholic Church Records, 1645-1969. The FamilySearch Research wikis for Puerto Rico Genealogy and United States Marriage Records also may be useful.
We hope this is helpful. Best of luck with your family research!